85 Beta TR33 New bike and need help

Discussion in 'Trials' started by GAwoody83, May 12, 2013.

  1. Twin-shocker

    Twin-shocker Long timer

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    I get the feeling the word "Legal" is very often heard if you are riding AHRMA events, but not likely to be a problem at an ITSA event.
    #21
  2. BEEF706

    BEEF706 King of the dumb dab

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    BTW your dad is my newest hero :clap
    #22
  3. GAwoody83

    GAwoody83 Been here awhile

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    Anyone know where I can find fork seals, and springs? Does it use two or four seals?
    #23
  4. Twin-shocker

    Twin-shocker Long timer

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    Fork seals from any good bearing supply shop (or Ebay), fork springs for Bultaco will fit, but you may need to alter pre-load a little.
    #24
  5. PSchrauber

    PSchrauber Been here awhile

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    Dust covers and fork seals should be still available through Beta.

    A nice bike but spare parts can be difficult to find for you in the US, so keep especially the plastics in very well shape.

    I recently bought a NOS rear plastic fender for my TR 34 in Italy for a riddicoulus amount of money, in cases like this I try to keep in mind that later riding around will be nearly costless ...

    The brakes btw. work pretty well on the bike and are far better then any drum brakes, brake pads are too easy to get.
    #25
  6. GAwoody83

    GAwoody83 Been here awhile

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    What about clutch plates? Can I use stuff from a 34? What is the difference between them besides the rear disk brake?
    #26
  7. PSchrauber

    PSchrauber Been here awhile

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    There are sadly not many parts the TR33 and TR34 shares.

    The frame is very much different, also plastics and gas tank.

    The engine got a bigger displacement a different primary gear ratio and different gears.

    The clutch was changed too, the very first production batch of TR 34 in 1987 had a clutch which could not catch up with the engine, so they changed the clutch during production and there was clutch rebuild kit available. So I don't believe you can use any parts from this model.

    There some part that is identical are the reeds, the fork and the front brake for the 1987 model. Fork and front brake where changed from 1988 on.
    #27
  8. motobene

    motobene Motoing for 44 years

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    I depends. Assuming correct jetting, the BP5ES is a good bet, as it is a hotter plug. Trials bikes, with their periods of slower puttering around, need hotter plugs to keep the tip cleaned off.

    If the 5-range NKG accumulates blackness over several rides, I opt for a hotter plug. My default plug now is the Champion RC14YC. I use it in my GasGas bikes. With an BPR5ES I get carbon accumulation over about 6 months of riding.This is hotter than the 5-range NGK. It tends to stay light colored and does not accumulate carbon over time.

    The RC14YC has a 5/8" hex and thus is lighter. The RN14YC has the bigger and heavier 13/16" hex. These do not have threaded tip so they won't work with plug caps meant for the threaded stem.

    I also gap plugs to 0.025" to 0.028" for easier starting and reduced flame outs.
    #28
  9. GAwoody83

    GAwoody83 Been here awhile

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    So i had to pull off the clutch cover on the beta to find a mysterious scrubbing noise and noticed where the displacement is usually marked on the base of the cylinder, it says 12.5137. any ideas? do i have the 125cc version? Also can anyone tell me how to properly tune my Dellorto PHBH 26bs carb. the screws are towards the cylinder not the air box.
    #29
  10. Monty348

    Monty348 Adventurer

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    I can't say for sure on the cylinder but this link might help
    http://www.trialscentral.com/forums/topic/23007-tr34-engine-size-125177/page__hl__tr34

    The mixture adjustment screw controls the fuel if it's toward the engine.


    #30
  11. lineaway

    lineaway Long timer

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    That is a Beta part #, not displacement.
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  12. GAwoody83

    GAwoody83 Been here awhile

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    So by the part # based on the tr34 stuff, it is a 240!
    #32
  13. lineaway

    lineaway Long timer

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    I`m bringing home one of these as a `barn find.` One of five other bikes. Will post pictures, before I start the process of getting them to run to be sold. The Beta might be a keeper as it has low hours on it.:clap
    #33
  14. PSchrauber

    PSchrauber Been here awhile

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    Sounds cool, :thumb

    another TR rescued ... I hope you have more luck then me with my find ... mine is still in the workshop, one issue follwed by the next depending the engine department ... :pissed I hopefully will get mine back at the end of this week.
    #34
  15. lineaway

    lineaway Long timer

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    Next week`s project.
    [​IMG]
    #35
  16. Brewtus

    Brewtus Buffoonery, Inc.

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    Finally, someone with more Trials junk than I have. :lol3

    Except for that TY175. Boy, that would make a nice Vintage ride. Don't you agree, NMTrailboss?? :deal :evil :D
    #36
  17. NMTrailboss

    NMTrailboss Team Dead End

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    :nod


    :tb
    #37
  18. BEEF706

    BEEF706 King of the dumb dab

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    Man, he is relentless, :D but correct :evil that was the mother lode of barn finds!
    #38
  19. BEEF706

    BEEF706 King of the dumb dab

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    Oh and I recognize most of them, what's that behind the TY?
    #39
  20. lineaway

    lineaway Long timer

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    The hidden Bultaco is a Miller High Boy. Seems like # 158 comes to my short term memory.
    `91 Beta Zero.
    #40